AT91072B
(en )
1923-01-25
Air or gas pump with two pistons rotating in opposite directions.
CH167591A
(en )
1934-02-28
Device for synchronizing the piston movements of crankless motor compressors with two free pistons rotating in opposite directions.
GB163309A
(en )
1922-01-12
Improvements in compressors, pumps, engines or the like having rotary pistons
FR551644A
(en )
1923-04-10
Low flow pump
FR829970A
(en )
1938-07-18
Rotary device usable as motor, pump or compressor
ES76652A1
(en )
1921-02-16
Improvements in reciprocating pumps and similar devices.
AT91360B
(en )
1923-02-26
Lubricating pump with drop glass.
ES76802A1
(en )
1921-03-01
Improvements in rotary pumps.
ES78647A1
(en )
1921-09-16
Improvements in rotary pumps.
ES78759A1
(en )
1921-10-01
Suction and impeller pump with outlet for the excess.
ES73469A1
(en )
1920-07-16
Improvements in the pumps.
ES75567A1
(en )
1921-01-01
Improvements in the pumps.
CH160244A
(en )
1933-02-28
Reciprocating compressors.
DK34885C
(en )
1925-08-17
Rotary Pump with Pistons inserted in the Rotor.
ES84263A1
(en )
1923-05-01
Improvements in the pumps.
ES70412A1
(en )
1919-09-01
Improvements in the pumps.
ES71061A1
(en )
1919-11-16
Improvements in the pumps.
ES89650A1
(en )
1924-09-01
Reciprocating multi-cylinder engines, pumps and compressors.
FR568666A
(en )
1924-03-31
Air pump without valve
ES72875A1
(en )
1920-05-25
Improvements in reciprocating pumps.
DK30818C
(en )
1922-11-27
Reverse Pump.
DK36160C
(en )
1926-06-28
Rotary Pump, Compressor or similar.
ES86474A1
(en )
1923-11-01
Improvements in pumps.
FI8561A
(en )
1921-06-22
Even in the piston
ES72134A1
(en )
1920-04-09
Improvements in rotary pumps.